【化】 检定吨; 化验吨(等于29.1667克(短吨)或32.67克(长吨))

Assay \As*say"\, n. [OF. asai, essai, trial, F. essa. See
{Essay}, n.]
1. Trial; attempt; essay. [Obs.] --Chaucer.

I am withal persuaded that it may prove much more
easy in the assay than it now seems at distance.
--Milton.

2. Examination and determination; test; as, an assay of bread
or wine. [Obs.]

This can not be, by no assay of reason. --Shak.

3. Trial by danger or by affliction; adventure; risk;
hardship; state of being tried. [Obs.]

Through many hard assays which did betide.
--Spenser.

4. Tested purity or value. [Obs.]

With gold and pearl of rich assay. --Spenser.

5. (Metallurgy) The act or process of ascertaining the
proportion of a particular metal in an ore or alloy;
especially, the determination of the proportion of gold or
silver in bullion or coin.

6. The alloy or metal to be assayed. --Ure.

Usage: {Assay} and {essay} are radically the same word; but
modern usage has appropriated {assay} chiefly to
experiments in metallurgy, and {essay} to intellectual
and bodily efforts. See {Essay}.

Note: Assay is used adjectively or as the first part of a
compound; as, assay balance, assay furnace.

{Assay master}, an officer who assays or tests gold or silver
coin or bullion.

{Assay ton}, a weight of 29,166 2/3 grams.


Assay ton \Assay ton\
A weight of 29.166 + grams used in assaying, for convenience.
Since it bears the same relation to the milligram that a ton
of 2000 avoirdupois pounds does to the troy ounce, the weight
in milligrams of precious metal obtained from an assay ton of
ore gives directly the number of ounces to the ton.
[Webster 1913 Suppl.] ||